Scale Factor Similar Figures Scale Drawings

Gwen scans a photo that is 4 in. wide by 6 in. tall into her computer. If she scales the height down to 3 in., how wide should the similar photo be?

• 3 in

• 2 in.

• 4 in

• 1 in

The two right triangles below are similar. What is x, the missing side length in triangle DEF? 

• 3.75

• 9.75

• 10

• 12

The __________ is the ratio of a length of the image to the corresponding length on the original figure.

• reduction

• enlargement

• scale factor

• center of dilation

The pair of figures is similar. Find the missing side.

• x = 9

• x = 28

• x = 7

• x = 63

To find the height of a very tall pine tree, you place a mirror on the ground and stand where you can see the top of the pine tree.  How tall is the tree?

• 144 feet

• 72 feet

• 36 feet

The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

• 12 feet

• 16 feet 

• 10 feet

• 4 feet

A scale drawing of a house shows 9cm ×10cm. If 6cm=12 ft, what are the actual dimensions?

• 9ft x 10ft

• 1ft x 2ft

• 12ft x 6ft

• 18ft x 20ft

If the actual dimensions of the kitchen are 24 ft. by 24 ft., what is the scale of the drawing?

• 1cm : 9ft

• 1cm : 8ft

• 4cm : 1ft

• 1cm : 4ft

The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

• 12 feet

• 16 feet 

• 10 feet

• 4 feet

Two objects that are the same shape but not the same size are _______.

• Congruent

• Vertical

• Similar

• Complementary